350 COMPLETE SPECIFICATIONS.

holes being avoided, and they must be so connected together as to give efficient drainage along the railroad.

Classification of Materials.—The materials found in excavations will be classed as Solid Rock, Loose Rock and Earth, the Chief Engineer being in every case the final judge as to the class to which any material belongs. ^

Solid Rock will include all loose boulders containing one /

cubic yard or more, and all hard rock in- compact strata or I

ledges exceeding six inches in thickness, which, in the judg- \

ment of the Engineer, cannot be loosened except by blasting. ;

Loose Rock will include all loose boulders containing, more \

than two cubic feet, and less than one cubic yard, and all mater- i

ials requiring the use of pick and bar, or which cannot be I

plowed with a strong ten-inch grading plow, well handled, \

drawn by a good six-horse team. J

Earth will include all materials of whatever kind which *

do not clearly belong to one or the other of the foregoing j

classes. ' ;

Whenever material of any kind other than Earth is found ^;

in an excavation, the Contractor shall at once notify the Engi- :J

neer in charge, so that he may make the necessary measure- '1

ments to determine its quantity. If the Contractor shall fail [

to give such notice, the Engineer may presume that the measurements taken at the time he first sees the material in question f will give the true quantity.

Solid or Loose Rock excavation will be paid for by adding . [

to the price of Earth excavation an extra price named in the /

contract, which shall cover the additional cost of loosening and '

loading the material.

r

RULES FOR MEASUREMENTS. *

For payment, earth work will be divided into three classes, as follows:

All material taken from excavations of every kind, excepting borrow pits, will be classed and paid for as excavation. • Earth taken from borrow pits opened to furnish material not obtainable from other sources and delivered in embankment, will be classed and paid for as earth borrowed. So much of the material from excavations or borrow pits as is neces- l

sarily hauled more than three hundred feet, will be classed as material overhauled, and a price in addition to that for earth A

excavated or earth borrowed will be paid for the hauling, said • f

price to be a price per cubic yard for each one hundred feet {

of haul in excess of three hundred feet.

Earth excavated will be measured in excavation; earth borrowed, where the whole embankment is made of earth, will ,'